How screwed am I?

In 2021, when I was 18, I sold an Instagram account for $60k via ACH transfer. I don’t remember receiving a W-9 or any form to file, which confused me at the time and led me not to file. I wasn’t well-educated about taxes then and thought I could get away with it. I've been thinking about it a lot lately and believe it's time to resolve this. What should I do to get it sorted out?